ob欧宝体育12.жұӮдёҖдёӘй•ҝж–№дҪ“жңЁеқ—жүҖеҚз©әй—ҙзҡ„еӨ§е°Ҹ,е°ұжҳҜжұӮиҝҷдёӘй•ҝж–№дҪ“зҡ„(B)гҖӮA.е®№з§ҜB.дҪ“з§ҜC.иЎЁйқўз§Ҝ2(2)жұӮдёҖдёӘй•ҝж–№дҪ“жңЁеқ—жүҖеҚз©әй—ҙзҡ„еӨ§е°Ҹ,жҳҜжұӮй•ҝж–№дҪ“зҡ„(B)A.иЎЁйқўз§ҜB.дҪ“з§ҜC.е®№з§Ҝ3дәҢгҖҒйҖүдёҖйҖү所ob欧宝体育占空间是求体积还是表面积(еҚ еӨҡе°‘з©әй—ҙжҳҜжұӮд»Җд№Ҳ)е…¶дёӯ,SиЎЁзӨәеңҶжҹұзҡ„иЎЁйқўз§Ҝ,hиЎЁзӨәеңҶжҹұзҡ„й«ҳ,rиЎЁзӨәеңҶжҹұзҡ„еҚҠеҫ„,ПҖиЎЁзӨәеңҶе‘ЁзҺҮ,зәҰзӯүдәҺ3.14гҖӮеңҶжҹұзҡ„дҪ“з§Ҝе…¬ејҸеңҶжҹұзҡ„дҪ“з§ҜжҳҜжҢҮеңҶжҹұжүҖеҚжҚ®зҡ„з©әй—ҙеӨ§е°ҸгҖӮеңҶжҹұзҡ„дҪ“з§Ҝе…¬ејҸдёә:V=ПҖrВІhе…¶

1、иЎЁйқўз§ҜжӯЈж–№дҪ“й•ҝж–№дҪ“дҪ“з§ҜжӯЈж–№дҪ“е®№з§Ҝж„Ҹд№үи®ЎйҮҸеҚ•дҪҚи®Ўз®—ж–№жі•6дёӘйқўзҡ„жҖ»йқўз§Ҝе№іж–№еҺҳзұіcm2е№іж–№еҲҶзұіdm2е№іж–№зұіm2гҖ”й•ҝГ—е®ҪпјӢй•ҝГ—й«ҳпјӢе®ҪГ—й«ҳгҖ•Г—2жЈұй•ҝГ—жЈұй•ҝГ—6жүҖеҚз©әй—ҙзҡ„еӨ§е°Ҹз«Ӣж–№еҺҳзұіcm3з«Ӣ

2、1гҖҒз”ЁеӨҡе°‘зҺ»з’ғ,жҳҜжұӮиЎЁйқўз§Ҝ;еҚеӨҡеӨ§з©әй—ҙжҳҜжұӮдҪ“з§Ҝ;иЈ…еӨҡе°‘ж°ҙжҳҜжұӮе®№з§ҜгҖӮ2гҖҒ1Г·4=0.25(L)0.25L=250mL3гҖҒи®ҫжӯЈж–№дҪ“еҺҹжЈұй•ҝдёә1,еҲҷжү©еӨ§еҗҺзҡ„жЈұй•ҝдёә2еҺҹиЎЁйқўз§Ҝдёә6*1^2=6жү©еӨ§2еҖҚеҗҺ

3、1гҖҒ6.26.2з©әй—ҙеҮдҪ•дҪ“зҡ„иЎЁйқўз§Ҝе’ҢдҪ“з§Ҝз©әй—ҙеҮдҪ•дҪ“зҡ„иЎЁйқўз§Ҝе’ҢдҪ“з§ҜиЎЁйқўз§Ҝ:иЎЁйқўз§Ҝ:еҮдҪ•дҪ“иЎЁйқўзҡ„йқўз§Ҝ;еҮдҪ•дҪ“иЎЁйқўзҡ„йқўз§Ҝ;дҪ“з§Ҝ:дҪ“з§Ҝ:еҮдҪ•дҪ“жүҖеҚз©әй—ҙзҡ„еӨ§е°Ҹ;еҮдҪ•дҪ“

4、дҪзҡ„еӣһзӯ”е®ҢзҫҺзҡ„и§ЈеҶідәҶжҲ‘зҡ„й—®йўҳпјҢи°ўи°ўпјҒ

5、жұӮжүҖеҚз©әй—ҙзҡ„еӨ§е°Ҹ,жҳҫ然жҳҜиҰҒжұӮдҪ“з§ҜпјҢжүҖд»Ҙеә”йҖүCеңҶжҹұзҡ„дҪ“з§ҜдёҚеҸҳпјҢиӢҘй«ҳжү©еӨ§дёәеҺҹжқҘзҡ„2еҖҚпјҢеҲҷеә•йқўз§Ҝеә”иҜҘпјҡcзј©е°ҸдёәеҺҹжқҘзҡ„дёҖеҚҠжұӮдёҖдёӘеңҶжҹұеҪўй“ҒжЎ¶иғҪиЈ…еӨҡе°‘еҚҮж°ҙпјҢжҳҜжұӮй“ҒжЎ¶

6、жұӮдёҖдёӘж—зӣ–жңЁз®ұжүҖеҚзҡ„з©әй—ҙжңүеӨҡеӨ§пјҢжҳҜжұӮжңЁз®ұзҡ„еҚең°йқўз§ҜгҖӮжңЁз®ұзҡ„еҚең°йқўз§ҜзӯүдәҺй•ҝд№ҳе®ҪгҖӮ

дҪ“з§ҜжҳҜжҢҮзү©дҪ“жүҖеҚз©әй—ҙзҡ„еӨ§е°ҸгҖӮдҫӢеҰӮпјҡдёҖдёӘзӣ’еӯҗйҮҢжңүдёҖеқ—з§ҜжңЁпјҢиҝҷеқ—з§ҜжңЁжүҖеҚиҝҷдёӘзӣ’еӯҗзҡ„еӨ§е°ҸпјҢе°ұеҸ«еҒҡиҝҷеқ—з§ҜжңЁзҡ„дҪ“з§ҜгҖӮ2所ob欧宝体育占空间是求体积还是表面积(еҚ еӨҡе°‘з©әй—ҙжҳҜжұӮд»Җд№Ҳ)A.Ве®ob欧宝体育№з§ҜB.B.ВдҪ“з§ҜC.C.ВиЎЁйқўз§Ҝ4жұӮеҶ°з®ұжүҖеҚз©әй—ҙзҡ„еӨ§е°Ҹе°ұжҳҜжұӮеҶ°з®ұзҡ„A:е®№з§ҜB:дҪ“з§ҜC:иЎЁйқўз§Ҝ5жұӮеҶ°з®ұжүҖеҚз©әй—ҙзҡ„еӨ§е°Ҹе°ұжҳҜжұӮеҶ°з®ұзҡ„гҖӮA.е®№з§ҜB.дҪ“з§ҜC.иЎЁйқўз§Ҝ